04-05-2013, 12:53 PM
Clark it depends on what you are heating. The one in my bedroom I set at 1000 (250 & 750 post) in the bathroom I used the 500 watt, in the Living room I used the 1500 watt.. if that is any help.. You need to consider total draw on those really cool nights when you don't want to run the furnaces...
Jimmy